Typographical casting-machine.



A. W. F. GUEST. -TYPOGRAPHICAL CASTING MACHINE.

' APPLICAT 0N FIL MAY2 A 1,269,598. Pzlt'end June 18, 1918.

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APPLICATION FILED MAY25|I9I41 1,269,598, Patented June 18, 1918.

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noa, n50@ IWI.. l I' UNITED STATES PATENT oEEIoE.

ALFRED W. F. GUEST, 0F BROOKLYN, NEW YORK, .ASSIGNOR TO MERG'ENTHALER LINOTYPE COMPANY, A CORPORATION OF NEW YORK.

TYPOGRAPHICAL CASTING-MACHINE.

Specieation of Letters Patent. Patented Julie 1S, 1918.

Application nled Hay 25, 1914. Serial No. 840,867.

To all whom t may 'concern Be it known that I, ALFRED W. F. GUEST, a citizen ofthe United States, residin at Brooklyn, in the county of Kings and tate of New York, have invented certain new and useful Improvements 'm Typographical Gasting-Machines, of which the following is a specication, reference being had therein to the accompanying drawing.

My invention relates to typographicalv casting machines, such as linotype machines of the general organization represented `in Letters Patent of the United States, No. 436,532, to O.'Mergenthaler, wherein molten metal is delivered at intervals by a pump or equivalent mechanism into a mold against a line of matrices to produce printing bars or slugs. In order to secure the most advantageous action of lthese devices, it is desirable that the molten metal in the pot shall be maintained at a substantially uniform level, audat practically the same temperature.

The purposeof my improvements is to maintain the required level and temperature in the ordinaryY pot by supplying thereto molten metal at such times and in such quantities as may be required. To this end'I provide a supplemental container or rece tacle adapted to hold a cnsiderabli-:sl supp y of solid metal and equipped with heating appliances, whereby the'metal therein is gradually or progressively melted and permitted to run into the pot. "A somewhat similar arrangement is shown inU. S. Letters Patent to J. S. Thompson, No. 723,073, but therein the action of the supplemental melting devices is controlled by a ioat resting on the metal in the pot, so that the height of the metal governs the delivery of the additional supply. I n the present instance I employ thermostatic devices to determine the supply of fuel to theV supplemental burner, these devices being preferably arrangedso that when the metal is at or below its normal level, the fuel will be supplied freely and when. it rises above its normal level, the su ply wlll be correspondingly diminished. the accompanying drawings, I have i l0 shown my invention only in preferred form and by wa of example, and as applied to the kind'o machine alread indicated, but obviously many changes an variations may be made therein, and in its mode of application', which will still be comprised within its spirit. Thus, the specific construction may be modified to meet different conditions, and it may be adapted to other forms of typographical machines, such for instance as machines which cast type and the like, instead of slugs or bars.' Generally speaking, I desire it to be understood that I dov not limit myself to anl specific form or embodiment, except in so ar as suchV limitations are specified in the claims.

Referring to the drawings:

Figure 1 1s a perspective view'of the melting pot, etc., of a linotype machine, having my improvements embodied therein; and

Fig. 2 is a vertical section thereof, on an enlarged scale and partly broken away.

The vpot A is of the usual construction and yis heated by one or more burners thereunder (not shown) tokeep the contained metal in molten condition. The supplemental chamber or magazine B, with its cover B2, is mounted in a suitable frame B1 above the pot andis designedl to hold a considerable supply of solid type metal in blocks or pigs C, which feed downward by gravity. The lowermost pig rests'within the melting cup or plate E, which is subjected to the heating influence of the auxiliary burner D, and the gradually fused metal flows therefrom through the orifice lil1 into the pot A. The partsv so far described are or maybe of any usual or preferred construction, except as hereinafter specified, and in themselves constitute n'o part of my present invention.

`The fuel or gas for the burner D enters through the pipe system F into the chamber F1, where it is divided, one portion passing to the constantly burning pilot burner F? at one end of the chamber, and the other and greater portion passing through the outlet F3 andfpipe system Gto 'the burnerA D.

The ow of fuel through the outlet Fs is governed by the valve H, the stem H1 of which is connected to the thermostatic arm or rod J. This thermostat may be of any desired construction, but is preferably constituted of two connected parallel strips of metal (for instance bronze and steel), having dil'erent coeilicients of expanslon, so that as its temperature is varied, the arm will bend to one side or the other, in the manner Well understood in the art. The thermostat J is referably contained in the vertical tube Il, which projects partially into the pot A, the tube being adjustab y arranged, as for linstance by screws L, so that its lower end will be substantially at or slightly above the normal level of the molten metal in the pot. Y It will be noted that in the present instance the illustrated capability of adjustment of the tube is somewhat limited, but obviously this can 'be creased to any extent desired to meet tige conditions encountered; for instance, t e normal level of the metal in the ot may vary considerably in' dierent machines, and this of course would necessitate the location of the thermostat in a higher or lower position to correspond therewith. v

The operation of the improvedzapparatus will now be readily understood. When the molten metal is at its .proper level (marked Open in-Fig. 2), the thermostatic arm J occupies its normal position, the valve Il is opened, and the fuel passes freely 'to the burner D. As the lowermost pig C isfused, the metal passes into"the pot, and the level of the metal therein rises, say for instance to that indicated by the Word Closed. Thereby the heating eii'ect on the tube K and thermostatJ is materially increased, and the latter turns or bends to the right, thereby moving the valve I-I and closing the orifice F3. This cuts off thefuel sup ly to` the burner D, the fusion' of the pig is diminished, and the level of the'metal in the pot A is again lowered.y Thereupon the arm J moves toward its normal position, and gas is again permitted to pass through the orifice F3. It will be understood that theproper quantities of fuel delivered to the burner D, namely the intermediate quantities lbe tween u'll supply 'and no supply, depend upon the position of the valve H, this in turn being controlled by the heating eEect on the'tube K of the molten mass at its ferent levels in the pot.

It will be noted that in accordance with:

my invention' the. orifice El through which the fused metal Hows from the'melting cup E into the main casting pot A is located a This isl advantageous in that there is produced in the cupa puddle of molten metal in which vthe solid pigs C are. partially immersed, thus greatly facilitating the melting of the solid pigs as the auxiliary burner is difturned o vand on automatically under the induence of the thermostat.

As previously stated, I have shown my invention only in preferred form and by way of example, and as applied to a particular style of typographical casting machine, but many alterations and modifications therein, and in its mode of adaptation, will suggest themselves to those skilled in the art, without departing from its scope.

Having thus described my invention, its construction and mode of operation, what I claim and desire to secure by Letters Patent of the United States, is as follows:

l. In a typographical casting machine, the combination of a main casting pot, an auxiliary chamber to contain the supply metal, a burner arranged beneath the auxiliary chamber, a fuel supply system for the burnenand means for controlling the flow of the fuel to the burner, the said means including a valve, and a'thermostat positively connected to the valve and adapted to move it positively to open and closed positions under the influence of the heat of the molten metal in the main casting pot.

2. In a typographical casting machine, theI combination of a main casting pot, an .auxiliary chamber to contain the supply metal,

a lburner arranged beneath the auxiliary chamber, av fuel supply system for the burner, and means for controlling' the ow of the fuel to the burner, the said means including a valve, and a thermostat compris-- ing two connected strips of metal having dferent poelicients of expansion and positively nnected to the valve'. and adapted to moveit positively bothto open'a'ud closed positions under the influence of the he'a't of the molten metal in .the main casting pot.

3. In a typographicalcasting machine, the combination of a main casting pot, an auxiliary chamber to contain the supply metal,

a burner arranged beneath the auxiliary chamber, a fuel supply system for the burner, and means for controlling the flow having diEerent coeici'ents of expansion and operatively connected to the valve stem H1.

4. In a typographical casting machine, the combination of a main casting@ potl and mechanism for feeding molten metal thereto, said mechanism includin a melting cup` to contain the supply meta4 and provided with a constantly exposed outlet opemng expot to regulate the supply of fuel to the tending through the verticalwall of the cup burner. 10

terminating above the bottom thereof, so l In testimony whereof, I have affixed my as to provide a dam over which the molten signature in presence of two witnesses.

5 metal must flow from the melting cup into ALFRED W. F. GUEST.

the main pot, a, burner located beneath the Witnesses: melting cup, and means controlled by the DAvm S. KENNEDY,

level of the molten metal in the main casting MARY BRANDT. 

